Finds the FormField defined for this form/concept combination while discounting any form
field found in the ignoreFormFields collection This method was added when
needing to relate observations to form fields during a display.

Finds the FormField defined for this form/concept combination while discounting any form
field found in the ignoreFormFields collection This method was added when
needing to relate observations to form fields during a display. The use case would be that
you know a Concept for a obs, which was defined on a form (via a formField). You can relate
the formFields to Concepts easily enough, but if a Form reuses a Concept in two separate
FormFields you don't want to only associate that first formField with that concept. So, keep
a running list of formFields you've seen and pass them back in here to rule them out.